Rubber-lined acid drum or container



March 9 1926. 1,575,681

R. T. GRIFFITHs I RUBBER LINED ACID DRUM OR CONTAINER Filed May 17, 1924Patented Mar. 9, 1926.

UNITED STATES PATENT OFFICE.

RICHARD T. GRIFFITHS, OF AKRON, OHIO, ASSIGNOR T THE MILLER RUBBER COM-PANY, OF AKRON, OHIO, A CORPORATION OF OHIO.

RUBBER-LINE!) ACID DRUM OR CONTAINER.

Application led May 17, 1924. Serial No. 713,984.

To ZZ whom, it may concern.'

Be it known that I, RICHARD T. GRIFFITHS, a citizen of the UnitedStates,'and residing at Akron, in 'the county of Summit, in the State ofOhio. have invented certain new and useful Improvements in Rubber-LinedAcid Drums or Containers, of which the following is a specification.

My present invention relates to rubber 30 lined acid drums or containersand more particularly relates to methods of seaming and fastening therubber linings in steel barrels or similar acid containers.

Onel of the objects of my invention is to provide means whereby therubber lining is anchored in the container to prevent shifting thereof.

Another object of my invention is to provide means whereby the seamsbetween the lining of the sides and the lining of the heads are heldunder compression and thereby relievedfrom strain..

A still further object is to provide means whereby the pressure on theseams'just described is limited so that excessive pressure cannot beapplied.

Other objects will be seen from the constructions shown and described inthe accompanying .drawing and description, and

claimed in the claims.

Referring to the drawings in which like numerals designate like parts:

Figure 1 is a central longitudinal section of a metal barrel or drumconstructed according to my invention.

Figures 2,' 3, 4, 5, 6 and 7 are similar fragmentary views showingmodified forms of my invention.

' Heretofore it has been proposed to line 4 metal containers such assteel barrels with acid-proof rubber so that they might be used fortransporting acids or other corrosive fluids' and take the place ofglass carboys now used, which besides having a very small capacity, arebreakable and must be handled with extreme care. It has been proposed toline these containers with hard rubbeil but that material is4 also quitebreakable, so that blows which would dent the container would break thelining.' Soft rubber I have devised a means whereby these difficultieshave been overcome. I accomplish this by clamping the seams of thelining 5 between the adjacent parts of the container and by providingfurther means of limiting the pressure thatA may be so applied.

I accomplish my purpose by providing an annular shoulder 1a on theinside of the coutainer wall 1, near the head, seaming the lining of thesides and head so as to over- 05 lie this shoulder andv providing thehead with means to exert a limited pressure on the'seam. The annularshoulder l in the side wall 1 may be formed by rolling a bead in theside wall, which may be of 7 angular formation, as shown at 1'll inFigs.

1 and 2, or of curved form as shown in Figs.

4, 5, 6 and 7 at 1*. If desired, the shoulder may be4 made as a separatering as shown at 1" in Fig. 3, in which case it may be 75 welded inplace as shown at 1", or may be otherwise fastened by rivets or screwsto the container wall. The head 2 of the container is preferably formedof one piece of metal and may be fastened to the side wall 9 of thecontainer by any form of chime construction ordinarily used, however, itshould be so designed as to be provided with an outward turned flange 2designed to extend to the chimes and `rovided with stop s means such asa radial s oulder 2" for engaging the side wall 1, and limiting, thedistance which the head may be inserted into the container. The flange2* is made of such length as to slightly compress the seam 3, when theshoulder 2* is against the flange 2B.

It is preferable that the impinging metal parts be roughened or providedwith surfaces having ridges, as illustrated in Figs. 2 and 3, at 2c and2d in advance of the other head surface, whereby a better grip on theseam is provided.

In Figs. 4, 5 and 6, I have shown forms of my invention in which ametallic ring rendered corro-sion proof by a rubber covering 4, is usedas a further seam locking device, which ring may be of different shapes,as for example the triangular formation shown at 4 in Figs. 4 and 5, orthe segmental shape shown at 4x in Fig. 6. In these forms the rubberforming the side wall lining 5, is turned inward over the ring, whichmay be corrugated, as in Fig. 6, and the rubber lining 6 of the head issuperimposed thereon and 11 held by the pressure exerted by the head. Ifdesired, the end closuremay be provided with a recessed portion 2* tocooperate with the internal bead to form the seam securing space, asshown in Fig. 7

In Fig. 1 the head has been indicated as fastened by rivets 7 in Fig. 2by a locked seam 8, and in the other figures by welding 9, although anyof the means shown may be used with any of the forms of seamconstruction illustrated. j

The type of rubber lining used is preferably of the type in which theside adjacent the wall is vulcanized for strength and the other sidcunvulcanized pure rubber which has been found to be more acid resisting.However, I do not wish to limit this invention to such use as it mightbe used with linings of either vulcanized or unvulcanized rubber, orsimilar acid-resisting material. It is understood that thc seams may becemented together by the use of rubber cement or vulcanized together inplace.

Having thus described my invention, what I claim is l. A portablecylindrical acid-proof shipping drum, comprising a cylindrical bodyhaving inwardly projecting annular shoulders adjacent each end, closure'heads secured to said ends, said body having a rubber lining themarginal portions ofwhich' overlie said shoulders, and said heads havingrubber linings the marginal portions of which overlie said shoulders,said overlapping marginal portions of the linings being clamped betweenthe shoulders and the heads.

2. A portable cylindrical acid-proof shipping drum, comprising acylindrical body having inwardly projecting rounded shoulders adj acenteach end, closure heads secured to said ends, said body having acylindrical rubber lining with the end margins turned inward towards thecenter of the drum, relatively stiff corrosive-proof rings lying betweensaid inwardly turned margins and said shoulders, and rubber liningsheets having their margins overlying said inwardly turned margins andclamped thereagainst by said heads.

3. The method of producing rubber lined acid-proof drums havingpermanently connected heads, which consists in providing a substantiallycylindrical body having inwardly projecting shoulders adjacent saidends, and having a rubber lining the edges of which overlie saidshoulders, applying to .said body, heads provided with rubber linings,the margins of which overlie the edges of the body lining, applyingpressure to the heads to compress the juxtaposed lining vmargins, andthereafter permanently securing the heads to the body.

In testimony whereof I aflix my signature.

RICHARD T. GRIFFITHS.

